Ruth's beloved grandfather instilled in her a love of timepieces. Unfortunately after her grandmother died and he remarried, Ruth and Grandpa Thom became estranged. She's wanted to reconnect after her recent divorce, but sadly they've run out of time. Her grandfather has been found dead after a break-in at his shopand the police believe he was murdered.

Anyone alive in the eighteenth century would have known that "the longitude problem" was the thorniest scientific dilemma of the day -- and had been for centuries. Lacking the ability to measure their longitude, sailors throughout the great ages of exploration had been literally lost at sea as soon as they lost sight of land. Thousands of lives, and the increasing fortunes of nations, hung on a resolution. The quest for a solution had occupied scientists...